Using the Vortex Live

I'm finally going to be able to use my Vortex in a live situation on New
Year's Eve. Does anyone have any tips on using it with a Top-40 band?
Here's my signal flow:
Guitar
|
SansAmp PSA-1 --> Volume Pedal --> Vortex
|
Marshall 8004 Power Amp
| |
12" EV 12" EV
The volume pedal and Vortex are in the PSA's effects loop.
Thanks,
Mark Kata
Mark@asisoftware.com